docs: def get_graph_by_id(self, network_id: int) -> BELGraph:
          """Get a network from the database by its identifier and converts it to a BEL graph."""
          network = self.get_network_by_id(network_id)
          log.debug('converting network [id=%d] %s to bel graph', network_id, network)
          return network.as_bel()